Rolling mill



June 18, 1929. T. A. SCHRAISHUHN 1,717 5 ROLLING MILL Filed Feb. 25, 1927 2 Sheets-Sheet l FIG. I

2 FIG 2 uiR A /fl";

FIG. 3

I INVENTOR I! heodore A-.Slzra.i5h.uh.-n

5, 94M zwrw June 1929- 'r. A. SCHRAISHUHN 1317.586

ROLLING MILL Filed Feb. 25, 1927 2 Sheets-Sheet 2 m wC v. .mE

HHHI Theodore /XSc/rrais/zuhn by W HWW his affarneq Patented June 18,1929.

UNITED STATES mmtime;

THEODORE A. SGI-IRAISHUHN,"0F CORAOI0LIS,- rnnnsyrv i wm, ssrenon TO LEWIS FoUNDRYa MACHINE COMPANY, A CORPORATION or PENNSYLVANIA.

ROLLING MILL.

Application filed February 25, 1927. SeriaIJNOF 170,833,

This invention. relates to a driving connection for a rolling mill, and particularly to a driving connection for a rolling mill constructed in accordance with my Patent No. 1,638,463, dated August 9', 1927. i

Such mill is particularly'designed for the cold forming of metallic shapes by bending the stock metal; and such mill is operated as a continuous mill, the stock being progressively formed in the successive passes thereof. For various classes of work it is therefore desirable that such mill comprise" a greater number of pairs of .diespindles than is necessary for other classes of work. For *this reason it is of advantage that the general arrangement of the mill be by units,'sothat a greater or lesser number of diespindles may be provided ina'machine without alteration in the fundamental design of the machine as a whole, and that the general machine assembly may beadapted to various classesof Work by the addition or removal of one or more units. p

It is desirable in such mill to so arrange the drivingconnections and housings of each 7 unit that the die spindles of the unit are held against horizontal movement inonc direction, and relative displacement of thedrivmg gears avoided without the provision of locking collars, or similar fastening means.

The patent, above noted, provides a double helical gear in the driving connections, this double helical gear rendering the pinions for the upper and lower spindles interchange able, and serving to direct inwardly the driving thrust on the lower spindles. This direction of the driving thrust prevents any unmeshing of the lowerpinionfs from the gear,

and prevents any undesired horizontal movement ofthe lower spindles. Outward move ment of the upper pinions an'dspindlesis avoided by linkage which'primarily serves for centering the upper pinions and the idlers which connect such pinions with the driving gear.

The object to prevent strainon such linkageby use of a driving gear, capable of meshing with both the lower and upper pinions, which directs the driving thrust inwardly on both pairsof pinions and the spindles which carry them.

In the accompanying drawings Figure 1 is a horizontal sectional view through one of the units comprised in a forming mill of the the present invention is .to.

above noted type; Figure 2 is a detail plan View of the immediate driving connections for the spindles of the unit; Figure 3 is a detail elevation of the structure shown in Figure 2; Figure 4 is'a central cross sectional view through theunit;'- and Figure 5 is a detail rear elevation, showing parts'of two spindle stands. r

The unit as a whole is mounted on a base or table 1; and comprises a rear housing formed of two U-shaped stands 2,and'a front housing. 3 comprising two U-shaped stands 4. The U-shaped stands 4: may be "connected by any suitable members, such as the seating members 3 and the bolted bracket 3 shown in Figure 5. Bearings 5 and 6 for theupper spindles 7 and lower spindles 8 respectively are supported bythe front and rear stands of the unit. f i. v The spindles of the unit are driven from a line shaft 9. At the rear of theunit is a casing 11.which is secured to the'stands forming the rear housing of the unit, and which contains the immediate driving con nections for the spindles of that unit. Such immediate driving connections comprise a unit driving shaft 12, which carries a worm' gear 13, meshing with a worm 14 on the line shaft 9.

The unit driving shaft 12 carries a wide helical gear 15. Driving gears 16and 17 have the two lower spindles 8 meshing with the helical gear toward its outer edge;

while idler pinions 18 and 19, meshing in turn with driving gears and 21 on the upper spindles-7, mesh with the inner portion of the helical gear 15. Both the drivmeans of adjustingscrews-22, which are 7' shown as of usual form. In order] that the. centers of the idler gears: 18 and19 and upper spindle gears 20 and 21 may be aligned irrespective of the adjustment of the upper spindles, specialmounting means'are provided for the idlers. Such mounting means comprise brackets 23 and 24, which are free on the unit drive shaft 12. provide bearings for the shafts 25 of the idlers 18 and 19. On shafts 25 are links 26 These brackets and 27. which are secured to the extremities of the spindles 7. I

Theidler mounting arrangement provides for the adjustment of the upper spindles without affecting the relative centers of their driving gears. Due to the fact that all of the pinions are of a wic th no more than half that of the main driving gear, the

- and slide the housings 4 completely off the lash between the'gea'rs. greater advantage where the dies carried by table 1. The dieshare then slid onto the spindles 7 and 8, andthe front'housings replaced. Inreplacing a front housing stand di'slides rearwardly of the spindles on the guide str1ps29,an'd 1s locked in proper position lVlllllfiIQSPQCt to the dies by means of fastenin bolts 30; In each unit the front housing, comprising the two stands 4:,may be adjuste'd as a wholeyor the stands may be adjusted one at atime byremoving bolts 33 in bracket 3*, and loosening bolt 30.

The dies may thus be readily applied to the spindles, and the front housing trans versely adjusted with respect-to the rear housing and dies withoutfthe use of spac ing collars or other spacing means.

IVhe'n the main driving'gear 15 is rotated in acounter clockwise direction, the driving thrust is directed inwardly of the spindles toward thefront housings. For this reason there is no necessity for using locking collars or the like to prevent rearward-movement of the spindles in the housings, There are therefore no, locking means between the rolls and the front stands to be unfastened i unmeshing of the gears beingavoided by the direction of :the 'drl'vlng thrust: The use of the helical gear. and helical pinions also permits the speed of the rolls to be accurately timed, since there is no play caused by back This latter is of a number of'opposed. upper and lower rolls are not identical, but cooperate wlth each other in a certain definite manner to effect on theother spindle.

" In witness whereof, I

1,717,586 7 I I V indentation of the stock in the forming on eration.

- What I claim is: y

1. Ina forming mill the combination of a base, arpair of housings on said base, a pair ofcoo'peratin spindles in said housings, a driving shaft, a relatively wide helical gear on said driving shaft, a pinion on the spindle meshing with the helical gear and of a width lessthan-one-lialf the width of said gear,a bracket freely mounted on the driving shaft, a shaft in said bracket, alink connecting said. shaft with the other spindle, an idler iinionon said bracket shaft and meshing with the helical gear, and a pinion on the spindle having teeth with a helix opposite to those of theother pinion, and having'a width less than one-half the width of the "helical gear meshing with said idler pinion to permit movement. thereof past the pinion onrthe other spindle.

2. In a forming mill the combination of a base, a pair of housings in said base, a pair of cooperating spindles in, said housings, a drlvingshaft, relatively wide gear on said driving shaft, a pinion on one spindle meshing with the driving gear and of a width less than one-half the width of said, gear, a bracket freely mounted on the'driving shaft, a shaft in said bracket, a link connecting said shaft: withflthe other spindle, an idler pinion-on said bracket shaft and meshing with the ,drivinggear, and a pinion on the driving gear. meshing with said idler pinion past the pin on to permit movement thereof a 3. In a forming milllthe' combination of a base, a pair of housings on' said base, one

of'said housings being mounted for movenient transversely ofthe base, a pair of cooperating and vertically spaced spindles in,

said housings,,a driving shaft, arelatively ,wide'helical gear on the driving shaft, and

helical pinions of a 'width less than one half that of the driving gear mounted on the spindles and driven from the gear, the tooth helix, ofthe opinions beingopposite and the helix of the several pinions beingso arranged withrespectto the direction of rota-' tion of the driving gear that the driving thrust, on both is directed toward-,thetransverselymovable housing. r Y

hereunto set my hand. r g Y THEODORE A. SOHRAISHUI-IN. 3 

